printf not printing out the given parameters

November 27, 2022

The code is supposed to print out 13:Hello World!, but the output is only 13:.

#include <stdio.h>
   int main(){

  char *str = "Hello World!\n";

 int Laenge= 0;

  while (*str++){

   ++Laenge;
   }  
  printf(" %d:%c\n", Laenge, *str);
  return 0;
   }

>Solution :

You can interate till you find the null character!

#include <stdio.h>

int main()
{
    char *str = "HELLO WORLD!\n";
    int len = 0;
    
    while(*(str + len) != '\0'){
        len++;
    }
    printf("%d:%s", len, str);

    return 0;
}

Your code is not working because your are incrementing the original string and converting it to ‘\0’. Use a walker.